Easy to handle.
Dialog boxes to design drawing elements easily with a database function to improve work flow.
A layer technique which is flexible to employ. It simulates working with transparency sheets.
HTML online help, illustrated with many graphics.
Graphical user interface based on GTK (The Gimp Toolkit).

Intuitive working in the ground plan, elevation and isometric views.
Computing graphics such as hidden line graphics or wire graphics from various perspective or isometric views.
Direct export to POV-Ray [TM of the POV-Ray Team] module to generate high-quality rendered images easily.
Extendable Material database to support output of 3D data to renderer.